Stamper and hammer for foundries



Oct. 23, 1934. ||l HEPPERLE 1,977,851

STAMPER AND HAMMER FOR FOUNDRIES Filed sept. 22, 1953 2 sheets-SmeL 1`INVENTOR Hei/1 156k v/feynp erle.

il Ar ATTORNEYS Get.

23, 1934. H. HEPPERLE STAMPER AND HAMMER FOR FOUNDRIES Filed Sept. 22,1953 2 Sheets-Shea*u 2 WZL/Lm LLM/fm.

la ATTORNEY Patented Oct. 23, 1934 sTAMrER AND HAMMERI FOR FOUNDRIES"`Heinrich Hepperle, Mulheim-on-the-Ruhr-Speldorf, GermanyV Applicationseptember 22, 1933, serial No. 690,523 In Germany September 26, 1932 6Claims.

This invention relates to foundry implements and more particularly tothe tools used in tamping molding sand around patterns fromwhichhowever, the sharp edge of 3a shovel frequently mutilates thepattern and its tendency is destructive to the flasks and other Woodenequipment of the foundry. y y

It is therefore an object of thepresent inven-v lf tion to provideatamper or rammer composed of ductile rather than rigid unyieldingmaterial, which cannot damage theparts with which it is brought intoforcible Contact, due to its elasticity..`

A still further object is to provide a hollow 20- yieldable impactorcapable of lateral expansion under the application of force andWhichrmaybe actuated by machine or by hand inits` workapplication. A Y

A further feature is in the provision. of a found- '25 ry sandtamperhaving itsl opposite ends unlike in size, and also in shape ifpreferred, so that a single implement may be used with equal facilityfor different kinds of work selectively.

Another purpose is to produce a convenient type 30"* of tool having anon-slip grip portion, that is of such weight as is compatible with itspurpose and in which the striking faces or impactors may be readilyrenewed as they become Worn, at a moderate cost, or other types of facessubstituted.

These meritorious objects are accomplished by the novel construction andcombination of parts hereinafter described and illustrated in theaccompanying drawings, constituting a material component of thisdisclosure, and in which:

Figure l is a side elevational view of an embodiment of one form of theinvention.

Figure 2 is a longitudinal sectional View of same, taken in a plane at aright angle to Figure 1.

Figure 3 is a view of the parts arranged in position for assemblage.

Figure 4 is a side View of one of the clamp members looking from itsinner proximate side.

Figure 5 is an end elevational View of the same.

Figure 6 is a side elevational view showing the parts as arranged foroperation in a pneumatic tamping machine for foundry use.

Figure 7 is a sectional View of an impactor head k as used in connectionwith a reciprocative tamp- 55. ing machine.

(Cl. .Z2-187) Figure 8 is a side elevational'` viewrof another forni ofthe device, partially in seotion.`

Figure 9 is a similarlview ofthe same, taken in a plane at a rightangleto Figure 8;` y

Figure l0 is an end elevational viewrthereof..

Figure 1l is a sectional View taken` on line 11-11 of Figure 8.

Figure 12 isa fragmentary longitudinalsectional view taken 'on linel2-120i `Figure 8.V

Figure 131s a plan'f View of orie of` the clamp' elements. l j lReferring to Figures 1 to 5 in greater detail; the tamping implementshown will be-seen to? consist of two impactor heads 15-16, respectivelylof ovoidal and circular`cross sectiongboth being composed of yieldablematerial, a's-semi-soft rubbei', and obviously may be of Aany'suitableshape," size and proportion for the work to be performed; these headscontaining openings 154--16 to per` mitlateral expansion.

Formedintegrally on the `base portions offeach of the impactors arecentral, longitudinallyextending, wedge shaped, tenori-like ridges17`-18.

These lridges are adapted tobe received between a pair of jaws 20-21,having undercut recesses 22 between them adapted to grasp and firmlyengage the wedge-shaped extensions 17-18, which are further held fromslipping endwise `by opposed pairs of inreaching end lugs 23 and centralserrated lugs 24, as best seen in Figures 3, 4, and 5. y

Formed with these jaws are semi-cylindrical stems 25 adapted to beforced into a socket 26 in the end of a metal tube 27, preferablyprovided with a covering 28 affording a non-slip grip for an operatorshand, a rubber tube being ordinarily employed; this handle element may,if desired, be weighted, as at 29 by filling the interior with lead orlike heavy material.

It will be obvious that the length and diameter of the tubularconnection between the clamps will be proportioned to suit varyingconditions, while the length of the clamp jars will be suited to engagethe impactor elements l7-`18, thus providing an efficient implement fortamping sand and like foundry purposes.

In Figure 6 is indicated conventionally a pneumatic operated machine forproducing reciprocative movement in an impactor of the type shown inFigure 7, the impactor head 30 having an undercut extension 30 heldbetween clamp jars 31 drawn together and connected with a body 32 by oneor more bolts 33, the body having a tapered socket 34 in its open, upperend to be engaged by a rod 35, parts of the reciprocating apparatus iro, addition to Icentra-l lugs 49.

being generally indicated by the numeral 36.

It will be understood that the ductile impactor head will be shaped inaccordance with requirements and is capable of acting as a rammer forthe sand without being destructive to wooden or metal patterns or otherdevices used in foundry practice.

Figures 8 to 13, inclusive, show a mallet or maul having the samegeneral characteristics as the foregoing and consisting of a pair ofheads 40, here shown to be substantially circular, provided with flatlevel operative surfaces, opposed to which are tenon-like integralridges 41, held between a pair of metal clamps 42.

These clamps are alike in all respects andprovided with interengagingtongues 43, on their proximate sides, adapted to engage withcorresponding grooves 44, in the opposite portion of the sides, andhaving openings to receive bolts by which they may be drawn firmlytogether.

The jaw elements 46 are formed with inreaching lugs 47,` in which areset lspurs 48 suited to engage the anks of the impactor tenons41,preventing longitudinal movement Aof the heads, in

Formed equally between the clamp elements 48 is a central circularopening k50, preferably enlargedat itsy central portion,` constituting abarrel shaped-space and having spurs`51 to engage with the wooden handle52 by which the implement is manipulated. 2

,On the opposite extremityof the handle 52 is a tenon 53 over which` maybe forced an elastic impactor 54, similar in purpose to the head 16 ofthe implement shown inFigures 1 and 2.

To those familiar with the art offoundry work, it will be apparent thateicient tools for the impacting of Sand, kand loosening of patterns,boxes and the like, have been described, but however', as changes ofconstruction could be made withinthe scopepof the invention, it isintended thatall matter contained in the foregoing description or shownin the accompanying drawings shall be interpreted as illustrative andnot in a limiting sense.

Having thus described the invention, what is claimed as new, and desiredto secure by Letters Patent is:

1. A foundry tamping implement comprising a rigid shank, opposed clampjaws carried by said shank, and a hollow elastic impactor removablyfixed between said jaws.

2. A foundry tamping implement comprising a rigid shank, a pair ofopposed undercut clamp jaws engaged by said shank, and a pliableimpactor containing an open passage and having a base kprovided with anelongated projection suited tol .be clamped between said jaws.

3. A-foundry tamping implement comprising a rigidshank, a Vpair ofopposed undercut clamp 4jaws engaged by said shank, a hollow pliableimpactor having a base provided with an elongated Yprojection suited tobe clamped between said jaws, said impactor being laterally expansibleupon the application of pressure on said shank.

4. A foundry tamping implement comprising a rigid shank, a pair ofopposed undercut clamp jaws engaged by said shank, a hollow pliableimpactor having a base provided with an elongated projection suited tobe clamped between said jaws, and means in said jaws to prevent movementthereof relative to said impactor.

5. A `foundry implement including a bar-like shank handlecomposed of atube having a weight inside and `a non-slip elastic cover, said tubehaving open sockets at its ends, pairs of undercut clamp `jaws havingtaper stems to tightly t said sockets, flexible heads having yieldingtenons to engage between said jaws, and corrugations in the faces ofsaid jaws to grip said tenons.

`6. A foundry implement comprising a rigid body having means forattachment to a machine for reciprocative movement, a socket in theopposite end of said body, clamp jaws arranged in mated pairs and havingstems adapted to be forced into said sockets whereby the jaws areclosed, the inner faces of said jaws being undercut, and soft,`non-metallic impactors having parts to be gripped between said jaws.

. HEINRICH HEPPERLE.

